The definition of zealous is having passionate energy for a belief or purpose.adjective
An example of zealous is a preacher in an energetic church.YourDictionary definition and usage example. Copyright © 2013 by LoveToKnow Corp.
Origin: ML zelosus < LL(Ec) zelus: see zeal
Used by arrangement with John Wiley & Sons, Inc.
- zealˈous·ly adverb
- zealˈous·ness noun